紅菱重工--產品與服務--NIIGATA重油發電機

V34HLX Series

Niigata, Japan's leading diesel engine manufacturer, introduces the Model V34HLX Series 340 mm bore heavy fuel medium speed diesel engine. In three sizes, 12V, 16V, and 18V the series offer an output range of 6 660 to 9 990 kWm per unit, designed to satisfy the current trend on size increment requirements mandated by most IPP/CPP power supply schemes worldwide.

The V34HLX Series deliver optimum performance via combustion and mechanical efficiency, simplified inspection and maintenance features, plus more environment-friendly operational capabilities such as low NOx emission and low noise and vibration levels.
　

The V34HLX series, combined with the field-proven 32C(L)X, V41HX and V46H(L)X models, now complete the line of high output medium speed diesel engines from 2000 kWe to 15 000 kWe per unit, providing narrow increments and wider flexibility range, meeting the Client's requirements on optimum size utilization. All models are highly suitable for co-generation, independent power production, marine propulsion and other industrial applications.

The V34HLX Series, as well as the other models, are produced in Niigata's ISO 9001-certified engine plants. Niigata has an extensive wealth of experience in the design, manufacturing and delivery of diesel engines, and has already produced more than 20 million kWm since the company manufactured the first industrial diesel engine of Japan in 1919.
　


FEATURES
OPTIMAL COMBUSTION EFFICIENCY
	* NCCS (Niigata Compact Constant Pressure Turbocharging System) * 30% output capacity rise compared to conventional engin. * Higher maximum combustion pressure (Pmax) of up to 19.6 MPa. * Brake mean effective pressure raised to 2.45 MPa, mean piston speed raised to 10.0m/s, 11% and 33% higher than the conventional diesel engine, respectively. * Specific output rate of 24.5 MPa.m/s noted as the highest level in the world for this engine size (the highest for conventional Niigata diesel engines has been 22.5 MPa.m/s) * High pressure, flash fuel injection system. * Cylinder liners equipped with fire rings. * Capable of burning low grade bunker fuel of up to 700 mm²/s (700 cSt) at 50 degC

SIMPLIFIED MAINTENANCE AND INSPECTION
	* Four-stud cylinder head fastening. * Wide air trunk built-in with crankcase. * Special hydraulic tools for disassembly and ressembly work. * Eliminated piping surrounding the engine for easy maintenance work.

DESIGNED FOR SUPERIOR RELIABILITY, LOW VIBRATION
	* Designed by FEM (Finite Element Method) stress calculation. * Stress measurement confirmation by component element tests. * NCI (Nodular Cast Iron) highly rigid monoblock double-walled crankcase and other main components. * Special chrome-molybdenum steel forged crankshaft with generously large main and crankpin journals, carefully counterweighted for high degree of balance.

　GENERAL SPECIFICATIONS

MODEL	12V34HLX	16V34HLX	18V34HLX
Type	Turbo charged, 4 cycle diesel engine with air cooler
Configuration	V-form
Cylinders	12	16	18
Bore	340 mm
Stroke	500 mm
Displancement	45.40 L/cyl.
Rotation Direction	Clockwise (Viewing from the coupling side)
Starting System	By compressed air
Fuel Injection System	Direct injection
Cooling Method	Water cooled
Turning Method	Gear type, Motor drive
Fuel Oil	Diesel oil or heavy fuel oil

　ENGINE OUTPUT

MODEL	12V34HLX	16V34HLX	18V34HLX
Frequency	50/60 Hz	50/60 Hz	50/60 Hz
Engine output	6 660 kWm	8 880 kWm	9 990 kWm
Engine output	(555 kWm/cyl)
Generator output	6 460 kWe	8 610 kWe	9 690 kWe
Engine speed	600 min^-1 (600 rpm)
Max. combustion pressure	19.6 MPa (200.0 kgf/cm²)
Mean effective pressure	2.45 MPa (24.93 kgf/cm²)
Mean piston speed	10.0 m/s

>>	The output figures shown in the tables represent the rating under the following standard reference conditions. If site conditions are different from the standard reference conditions, the output shall be adjusted from the above figures. Standard Reference Conditions :
		1) Ambient temperature: 40 degC 2) Cooling water (air cooler inlet) temperature: 35 degC 3) Atmospheric pressure: 101.3 kPa (760 mm Hg) 4) Generator output is subject to generator efficiency

　DIMENSIONS & MASS

MODEL	Principal Dimensions (mm)					Mass (t)
MODEL	A	B	C	D	E	Engine	Generator
12V34HLX	7 599	3 535	11 134	4 100	3 800	73	24
16V34HLX	8 919	4 135	13 054	4 110	3 800	97	36
18V34HLX	9 579	4 835	14 414	4 110	3 800	108	38

Note: The mass and dimensions of generators shall be subject to electrical design.
　


DESIGN & CONSTRUCTION FEATURES
1 Crank Case 　The monoblock type double-walled box structure crank case made of Nodular Cast Iron is carefully designed for sufficient strength and rigidity necessary for the high Pmax of this engine. The simple design incorporates a wide area charge air trunk reducing air flow friction loss. The top portion of the liners are provided with jacket water cooling channels while the lower portions are air cooled to avoid over-cooling and water corrosion.
		2 Crankshaft & Main Bearings 　The crankshaft is forged from a special chrome-molybdenum steel stock with generously large main and crankpin diameters keeping the bearing load and torsional stresses low even with the high Pmax of this engine. Carefully designed counterweights ensure high degree of balance for sufficient and consistent bearing oil film thickness. Thin-backed 3-layer kelmet type bearings of high surface pressure resistance are provided for the main and crankpin journals for long bearing service life.
3 Pistons 　The world's first ever for this size and rating, a monoblock type special Nodular Cast Iron piston featuring low weight but high Pmax capacity is successfully adopted for this engine. By careful FEM design calculations, a rigid piston crown with wide cooling spaces was realized ensuring very effective cooling by forced feed lubricating oil shaking system. The thin-walled skirt reduces total piston wight and inertia and easily harmonizes with the expansion coefficient of the special wear resistant cast iron cylinder liner. The pistons are supplied from Niigata's own foundry using improved casting techniques.
		4 Connecting Rods 　The connecting rod is of the three-piece design consisting of a horizontal-split large end bearing housing, to suit the large diameter crankpin, and the piston rod bolted to it. The bearing load stress is greatly reduced. The piston and rod can be easily removed independently from the large end bearing housing allowing lower lifting headroom.
5 Cylinder Liners 　Made of a special wear-resistant cast iron, the cylinder liners assure wear-free operation for long periods. Replaceable fire rings are further fitted at the top portion of the liner combustion zone, relieving the liners from abrasive wear caused by carbon deposits, optimizing the function of the compression rings, and thus maintaining better combustion pressure curves for long periods. Lubricating oil consumption is also reduced. The upper engaging section of the liners have a thick wall structure ensuring rigidity needed for high Pmax operation and bore-cooled for uniform thermal deformation.
		6 Cylinder Heads 　The bore-cooled cylinder heads, made of CV (compacted vermicular) cast iron, optimize mechanical stress distribution, provide better thermal conductivity and reduce thermal stress, a prelude to successful high Pmax operation. A four-stud design is applied to provide wider intake and exhaust ports reducing gas flow losses resulting in improved combustion performance.
7 Exhaust Valves 　Nimonic (special high corrosion resistant alloy valves with mechanical "rotomat" rotators are applied for long reliable operation.
		8 Fuel Injection Pumps & Fuel Injectors 　A high pressure of 147.1 MPa (1 500 kgf/cm2) fuel injection pump, a mini-mass injector, as well as a short cycle injection pipe that goes through the cylinder head, are applied for higher combustion efficiency and better fuel economy. The injection nozzle spray holes are specially treated to increase discharge coefficient, thus improving combustion and prolonging nozzle tip service life.